I won a G2 as a door prize at a LEO event a couple of years ago. After the second bulb burned out, I decided to upgrade to LED with the KX4D. Just like all the previous reviews, it is an excellent fit and finish and way brighter than the regular bulbs. However, just like the previous reviews, the only disappointment was the cost of the unit compared to other complete flashlight products that are out there that are a bit brighter and run on AA longer.

Reviewed by Russ3 (Posted on 3/26/15)

KX4D upgrade

Excellent. Far brighter than before, while saving power. No need to be miserly with using it anymore. Of course I can get a G2X for the price, but I prefer upgrading my trusted Centurion rather than mothballing it just because of a pre-LED-era lamp. Love the pointy things.

Reviewed by KK (Posted on 1/16/15)

KX4D

Replacement head KX4D fit as a replacement for the P60 and works very well. Just like new. My disappointment is the performance and cost. In comparison to a NiteCore MT21A i bought for my daughter, the NiteCore is less than 1/2 the cost, is noticeably brighter than the SureFire and uses commonly available AA batteries.

Reviewed by Ken (Posted on 1/12/15)

New flashlight

Like getting a new flashlight .

Reviewed by dts3204 (Posted on 12/5/14)

KX4D

Best thing since sliced bread.

Reviewed by nickaa81 (Posted on 9/6/14)

Great Replacement

I have an older 9P and wanted an LED head. This has been a great replacement. I get good brightness and longer battery life. I'm very happy with the purchase and the product.

Reviewed by nbcaudio (Posted on 8/13/14)

can be used with E2D exe defender?

Just want to check whether, can I buy this for replacement of Xenon Bulb (E2D Executive Defender).

Reviewed by Oddy (Posted on 6/24/14)

Easy to install/great upgrade

This head is a great upgrade for the 6D I had gotten used to having to replace my batteries every week and with this LED I have gotten 2 weeks of use before I need to replace my batteries. All that was required for install was to screw on the new head.

Reviewed by Dstrada (Posted on 1/4/14)

KX4D LED Conversion Head with Crenellated Strike Bezel

Bought the KX4D to replace a P60 XC2 bulb that broke after I dropped it for the umpteenth time. Much brighter light and better battery life.

Reviewed by Pat Dietz (Posted on 12/29/13)

KX4D in Law Enforcement

I too purchased the KX4D as a replacement for my existing bulb because I did not want to throw away a perfectly good light. I am very happy with the replacement LED bulb and only wish it had been a little cheaper.

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Specifications

Max Output -- White Light

120

.0

lumens

Bezel Diameter

1

.25

inches

*Runtime until output drops below 10% of maximum output

Description

KX4D-BK

The KX4D LED conversion head changes the maximum output of compatible 2-and 3-battery SureFire flashlights to 120 lumens and enhances their self-defense capability with a crenellated Strike Bezel®. Upgrades SureFire incandescent flashlights equipped with P60, P61, P90, or P91 lamps by replacing their incandescent emitters with a high-efficiency LED emitter that has no filament to burn out or break. The KX4D is machined from aerospace aluminum and has a black Type II anodized finish. A precision micro-textured reflector combined creates a smooth, flawless beam. To convert, simply remove the original flashlight head and screw on the KX4D.